Film hanger with tapering sides



FILM HANGER WITH TAPERING SIDES Filed May 51, 1947 2 Sheets-Sheet 1 ulllllllllll .2/ JACK FR/EDMAN May 30, 1950 J. FRIEDMAN FILM HANGER WITH TAPERING sIDEs 2 Sheets-Sheet 2 Filed may 31, 1947 JACK FR/EDMAN @www Patented May 30, 1950 UNITED STATES -FILM- HANGER WITH TAPERINGSSI'DES' Jack Friedman, St..Paul, Minn., assignorfof.y onehalf'to Dorothy L. Friedman, St.lP'aiil`,.Minn.

Application May -31,1947; Serial-'No.'751i540 (Cl. S35- 100) 3 Claims. 1

This; invention relates to. improvements, in lm hangers-.and thelprimaryobject is to .providea frame inlwhch Xfray-lms may heiconveniently fastened -rand manipulated. through the usual A developing, xing, washing and drying operations, all-with themaximum of convenience and withoutfdamage to,: or wrinkling of, lthe film.

The presentY day hangers for this Y purpose, Vv,to

object'swill be disclosed in the course of' thefollowing specification; reference' Vbeing had 'to-thev accompanying' drawings, in which- 'Fig.'1 is an elevationof my improved'film hanger with a -lrn inplace therein.V

Fig'. '2is an edge View of several 'film hangers supported in a Adeveloping or fixing4 tank, partially shown' in cross section.

Fi`g.3'is anenlarged' sectional view along the line3'3 in Fig. 1.

Eig. :.4 is. anVv enlarged, fragmentary perspective View` oi? the jaw end'oflone ofthe clips or. fasteners for the lm.

Referring Vnow-more particularly and' by reference characters to the drawing, A designates the usual rectilinearX-ray film and B a hanger therefor, constructed in accordance with `my invention. There are several standard sizes of lms and it will be .understood that my hanger will be made in appropriate sizes to nt.

Thehanger B comprises a rectangular frame preferably fabricated trom-a suitable plastic havingai lower-end I0, sides I I and` I2 and an upper end or'supportl bar I3; The inside dimensions of: the lframe are-such-as tov looselyaccommodate the film -A, thev frame-lacing considerably' longer vertically' toY provide 4clearance at the top'for integraljgussets Hrwhich'join the' sides II and I2and' the upper end'13', andv .for the fasteners forL the'upper end of the frame; as clearly shown'. The sides II andV I2 are quiteA thin while the bottom IIJ is Wide (vertically) and heavy enough so@tha1'.the frame is weighted-.at this lowereend and may be readily lowered straight into the VThese-and'other morey detailed andfspeciiie'Y 40" angles, toi-the ,axes-.of .the :openings-l 2,4...to ,properdevelopingtorfother liduidtwithont anyatendeney to. oatil toieithergside.

4misacerit its junction :with the sides .ll .and I 2 `the v.lower frame :end .f I Il :hase-notches or 13ecesses I5 which openarurwardly:.andtoone aside,V "orminglrests or supports .IB .st each Side. ,lt

Willrheznoted:tirata-tha'horizontalis rfacesf-,ofthe end t0,iandzthese;;rcsts Ilse" te llf-.bieledxdffat-their-,edges I 'Irsothatfluidf will: -runzotfrrsaxily when the .lianeer @is removed from the liquid. f

designated generally. ati t8.; andztheecdnstriiction of `which will presently che described at thisl point; itois suliicienl'ftto. state that :the clins include zthreadsd` studs-or pins I9 :which :extend 'downlthrough openingen. inthelow. messed I 0 .zand .are provided with; retaining nuits 2 I so that @the-clips @may Lube t, removed :and replaced When necessary.

Similar clips I kaare provided: for aengagngpthe upper ,corners of the jilmaA; andrthesel-'clipssare attached .iat 4;22.".,to-:,the lower: ends of yretractile coil pl'ings i 23" which...ange1e upwardly.; .and out wardly upf-.into openings onguidewaysulformed in. the corner -gussets I4. 'Ihesemopcnings 24 house; .apartl ,'ofzthe'; springsri preventing-.,them from r dangling about; and 1 facilitating the attachment pofrythe- :upper: clipsatd. the: nlm 5asatwill berunderstood'. xzThe, springs; 23l arefattached at upper ends? to: threaded? studs .or @pins z; 25 which.

extend upwardly: througmsmauen extensions 126 of tha-openings .12 handdthesesstudsi are:provided at.;upper ,endsvwithinutsg 21; torlanchorthe @rings but to permitucontenientzremovaloanderenlaoement, when necessary.

n.The aupper'fend I3 of the iframe :proie'ets at eachl extremity beyond thezriramefsides 1 maand I I .in f the-,f form off suitably .fr tapered: iii-.nests 24.28- and itfwillmbe. fnotedithat Wheretheonuts 521 .are placed, angular surfaeeslrfare fformedlat right lyseatthe nuts.

.- Attention is calledlto the; shapeiof the; frame sides.- I If; and I2v .taper .upwardly and.. =downw a-,rdl-y from.A their centers, .at Iwhich. they. are substantially widen. rand.` thate the! upper I end lf3 f of the frame is the same width-asthme wide;.cen-.tersgof they frame sides.- ,.Y'Ihe importance of this .conformatiorrwill .Abe :presently: setl out.

The clips?l i 8 are.. somewhatA Similar :to theconventonal .clampaoreamr typeslipS ion; S115- penders ,andthe like; aandoende-*affixediaw .having apertured ears 3I turneduf-mmzil's @dsn and between which is positioned a movable jaw 32 and a cam member 33 which is pivoted at 34 between the ears 3I and has an end 35 to engage and cam the jaw 32 to a closed position as seen in Fig. 3. When the cam member 33* is swung away from the jaws its end 35 clears the jaw 32 to allow the ends of the jaws to spread apart in a well known manner. The studs I9 are fixed to the ends of the fixed jaws 30 in the case of the lower clips, while the springs 23 are hooked to these jaws in the upper clips. The clips are preferably made of stainless steel.

For my purpose the working ends of the jaws 30 and 32 (Fig. 4) have edges 36 turned back and adapted to clamp and grip the film A when the clips are engaged therewith, while one jaw has triangular notches 31 to receive complementarily shaped teeth 38 on the other so that the clips will perforate the film also and thus obtain a secure grip thereon. The ends of the teeth 38 are preferably also barbed as indicated at 38 to further assist in securing a firm hold on the film.

In use, the film A is placed in the hanger frame and is first fastened at its lower end by the lower clips I8. For loading the hanger it may be conveniently placed in an easel-like support (not here shown) and it will be found easy to properly center and straighten the film with respect lto the frame bottom I9. The springs 23 are then pulled down and the upper clips I8 engaged with the film and since the springs then exert both upward and outward forces on the nlm it will be held taut and flat as will be understood. The dual perforations made by the teeth 38 on each clip overcome any tendency of the nlm to twist about on the lower clips and get out of line as the upper clips are engaged and it is found that the hanger is very easy to load even in the darkroom where this work is done.

When so mounted in the hanger the film may be handled with ease and may be suspended in the developing or fixing fiuids which are provided in tanks, such as indicated at C in Fig. 2. The hangers will engage at their lingers 28 on the sides of the tank to suspend the lms in the fluid and it is at this point, where a member of the hangers are positioned. side by side as shown in the drawing that the double-tapered shape of the frame sides II and I2 becomes of importance. Thus the films A are spaced apart a distance equal to the maximum width of the frame so that there is no possibility of the films touchand and causing so-called kiss marks, while the tapered sides provide spaces, indicated at 40, through which the fluid may freely circulate around all of the lms. The wide upper ends I3 of the hangers maintain this spacing and prevent the hangers from fanning apart at lower ends when a group of hangers are grasped or moved lengthwise of the tank.

It will be noted that the clips I8 are all so located in the frame that the film A is exactly centered, as viewed from the edge, to obtain the maximum spacing between films in adjacent hangers, and further that the lower clips particularly have no projections which might catch on and pull up an adjacent hanger when one is being lifted from the tank, as frequently happens with present day hangers.

-For the accommodation of smaller lms the frame sides Il and I2 and lower end I 0 may be reduced in length but the upper end I3 will preferably remain the same length so as to properly and supportably engage the readily understood.,

tank sides, as will beY It is understood that suitable modications may be made in the structure as disclosed, provided such modifications come within the spirit and scope of the appended claims. Having now therefore fully illustrated and described my invention, what I claim to be new and desire to protect by Letters Patent is:

1. A film hanger for hanging an X-ray film in a developing or fixing tank, comprising a rectangular frame having upper and lower ends and connecting sides adapted to enclose the film, said upper end of the frame having end projections to hang on the sides of the tank, means for fastening the film in the frame, the sides of the frame being widest at their centers as viewed from the edges of the frame to space films in adjacent hangers apart, and the said frame sides tapering from substantially their centers toward upper and lower ends thereby forming spaces between adjacent hangers through which the developing and fixing fluids may freely circulate about the opposite sides of the films, the said upper ends of the hanger frames being substantially the same width as the wide centers of the frame sides.

2. A film hanger for hanging an X-ray film in a developing or xing tank, comprising a rectangular frame having upper and lower ends and connecting sides adapted to enclose the lm, said upper end of the frame having end projections to h-ang on the sides of the tank, means for fastening the lm in the frame, the sides of the frame being widest at their centers as viewed from the edges of the frame to space films in adjacent hangers apart, and the said frame sides tapering from substantially their centers toward upper and lower ends thereby forming spaces between adjacent hangers through Which the developing and fixing fluids may freely circulate about the opposite sides of the films, and the upper ends of the frames being as wide as the centers of the frame sides to thereby prevent the hangers from f-anning yapart at lower ends when a group of hangers are pushed along the tank or lifted therefrom.

3. In a film hanger wherein is embodied a frame having upper and lower ends and spaced sides defining an opening to accommodate a film and having means for holding a film in said op` ening, the improvement which consists in tapering the opposite edges of the frame sides upwardly and downwardly from a common point the thickness of which at least equals the thickness of the upper end of the frame.

JACK FRIEDMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 617,335 Hall Jan. 10, 1899 1,141,314 Caldwell June 1, 1915 1,237,562 Schoenberg Aug. 21, 1917 1,955,575 Buck Apr. 17, 1934 Y, 2,299,779 Wolf Oct. 27, 1942 2,352,601 Burke July 4, 1944 v 2,370,434 Wolf Feb. 27, 1945 2,436,882 Edelhart Mar. 2, 1948 2,445,496 Sardeson et al July 30, 1948 FOREIGN PATENTS Number Country Date 24,451 Sweden Apr. 4, 1908'` 

